1 files changed, 28 insertions, 1 deletions
diff --git a/data_buffer.h b/data_buffer.h
index c3d86e8..bc264d2 100644
--- a/data_buffer.h
+++ b/data_buffer.h
@@ -1,14 +1,41 @@
 #pragma once
 
+/* SPDX-License-Identifier: Unlicense
+ */
+
+#include "common.h"
+
 #include <cstddef>
 #include <cstdint>
 
+struct DataView {
+    const uint8_t *const buffer{};
+    const size_t size{};
+};
+
 struct DataBuffer {
+    DataBuffer(){};
+    DataBuffer(const DataBuffer&) = delete;
+    constexpr DataBuffer(DataBuffer&& other)
+        : buffer(other.buffer)
+        , buffer_size(other.buffer_size)
+        , occupied_size(other.occupied_size)
+    {
+        other.occupied_size = 0;
+        other.buffer_size = 0;
+        other.buffer = nullptr;
+    };
     static constexpr size_t kInitialSize = 4 * 1024;
     uint8_t *buffer{new uint8_t[kInitialSize]};
     size_t buffer_size{kInitialSize};
     size_t occupied_size{};
     void Expand(size_t new_size);
+    constexpr auto View(size_t offset = 0, size_t size = SIZE_MAX) const
+    {
+        if (offset >= occupied_size) {
+            return DataView{};
+        }
+        return DataView{buffer + offset, Min(occupied_size - offset, size)};
+    };
     ~DataBuffer();
 };
-